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Two girls, each of weight 400 N climb up a rope through a height of 8 m. We name one of the girls A and the other B. Girl A takes 20 s while B takes 50 s

to accomplish this task. What is the power expended by each girl?

Sciences - Main Course Book

Chapter 11. Work and Energy


Power= Force*Distance/Time

Power by A=400*8/20=1600 N/m^2

Power by B=400*8/50=640 N/m^2
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